The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 1991
Filed:
Apr. 04, 1988
Applicant:
Inventors:
Ivor R Harris, Birmingham, GB;
Syed H Safi, Birmingham, GB;
Assignee:
The University of Birmingham, Edgbaston, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
75232 ; 75228 ; 75244 ; 419 19 ; 428570 ; 428469 ;
Abstract
A non-sintered permanent magnet is formed by a cold compacting technique or by resin bonding using particles of a stoichiometric alloy (e.g. R.sub.2 Fe.sub.14 B where R is at least one rare earth and/or yttrium, particularly La, Ce, Pr, ND or Y or a mixture thereof) which have been coated with a reaction product of the alloy or a non-magnetic metal such as Sn, Ga, Zn, Al, or Cu. The use of a stoichiometric alloy avoids the presence of a reactive grain boundary phase normally present in non-stoichiometric alloys.